1 /* 2 * pci.h 3 * 4 * PCI defines and function prototypes 5 * Copyright 1994, Drew Eckhardt 6 * Copyright 1997--1999 Martin Mares <[email protected]> 7 * 8 * For more information, please consult the following manuals (look at 9 * http://www.pcisig.com/ for how to get them): 10 * 11 * PCI BIOS Specification 12 * PCI Local Bus Specification 13 * PCI to PCI Bridge Specification 14 * PCI System Design Guide 15 */ 16 17 #ifndef LINUX_PCI_H 18 #define LINUX_PCI_H 19 20 /* Include the pci register defines */ 21 #include <linux/pci_regs.h> 22 23 /* 24 * The PCI interface treats multi-function devices as independent 25 * devices. The slot/function address of each device is encoded 26 * in a single byte as follows: 27 * 28 * 7:3 = slot 29 * 2:0 = function 30 */ 31 #define PCI_DEVFN(slot,func) ((((slot) & 0x1f) << 3) | ((func) & 0x07)) 32 #define PCI_SLOT(devfn) (((devfn) >> 3) & 0x1f) 33 #define PCI_FUNC(devfn) ((devfn) & 0x07) 34 35 /* Ioctls for /proc/bus/pci/X/Y nodes. */ 36 #define PCIIOC_BASE ('P' << 24 | 'C' << 16 | 'I' << 8) 37 #define PCIIOC_CONTROLLER (PCIIOC_BASE | 0x00) /* Get controller for PCI device. */ 38 #define PCIIOC_MMAP_IS_IO (PCIIOC_BASE | 0x01) /* Set mmap state to I/O space. */ 39 #define PCIIOC_MMAP_IS_MEM (PCIIOC_BASE | 0x02) /* Set mmap state to MEM space. */ 40 #define PCIIOC_WRITE_COMBINE (PCIIOC_BASE | 0x03) /* Enable/disable write-combining. */ 41 42 #ifdef __KERNEL__ 43 44 #include <linux/mod_devicetable.h> 45 46 #include <linux/types.h> 47 #include <linux/ioport.h> 48 #include <linux/list.h> 49 #include <linux/compiler.h> 50 #include <linux/errno.h> 51 #include <asm/atomic.h> 52 #include <linux/device.h> 53 54 /* Include the ID list */ 55 #include <linux/pci_ids.h> 56 57 /* File state for mmap()s on /proc/bus/pci/X/Y */ 58 enum pci_mmap_state { 59 pci_mmap_io, 60 pci_mmap_mem 61 }; 62 63 /* This defines the direction arg to the DMA mapping routines. */ 64 #define PCI_DMA_BIDIRECTIONAL 0 65 #define PCI_DMA_TODEVICE 1 66 #define PCI_DMA_FROMDEVICE 2 67 #define PCI_DMA_NONE 3 68 69 #define DEVICE_COUNT_COMPATIBLE 4 70 #define DEVICE_COUNT_RESOURCE 12 71 72 typedef int __bitwise pci_power_t; 73 74 #define PCI_D0 ((pci_power_t __force) 0) 75 #define PCI_D1 ((pci_power_t __force) 1) 76 #define PCI_D2 ((pci_power_t __force) 2) 77 #define PCI_D3hot ((pci_power_t __force) 3) 78 #define PCI_D3cold ((pci_power_t __force) 4) 79 #define PCI_UNKNOWN ((pci_power_t __force) 5) 80 #define PCI_POWER_ERROR ((pci_power_t __force) -1) 81 82 /** The pci_channel state describes connectivity between the CPU and 83 * the pci device. If some PCI bus between here and the pci device 84 * has crashed or locked up, this info is reflected here. 85 */ 86 typedef unsigned int __bitwise pci_channel_state_t; 87 88 enum pci_channel_state { 89 /* I/O channel is in normal state */ 90 pci_channel_io_normal = (__force pci_channel_state_t) 1, 91 92 /* I/O to channel is blocked */ 93 pci_channel_io_frozen = (__force pci_channel_state_t) 2, 94 95 /* PCI card is dead */ 96 pci_channel_io_perm_failure = (__force pci_channel_state_t) 3, 97 }; 98 99 typedef unsigned int __bitwise pcie_reset_state_t; 100 101 enum pcie_reset_state { 102 /* Reset is NOT asserted (Use to deassert reset) */ 103 pcie_deassert_reset = (__force pcie_reset_state_t) 1, 104 105 /* Use #PERST to reset PCI-E device */ 106 pcie_warm_reset = (__force pcie_reset_state_t) 2, 107 108 /* Use PCI-E Hot Reset to reset device */ 109 pcie_hot_reset = (__force pcie_reset_state_t) 3 110 }; 111 112 typedef unsigned short __bitwise pci_bus_flags_t; 113 enum pci_bus_flags { 114 PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1, 115 }; 116 117 struct pci_cap_saved_state { 118 struct hlist_node next; 119 char cap_nr; 120 u32 data[0]; 121 }; 122 123 /* 124 * The pci_dev structure is used to describe PCI devices. 125 */ 126 struct pci_dev { 127 struct list_head global_list; /* node in list of all PCI devices */ 128 struct list_head bus_list; /* node in per-bus list */ 129 struct pci_bus *bus; /* bus this device is on */ 130 struct pci_bus *subordinate; /* bus this device bridges to */ 131 132 void *sysdata; /* hook for sys-specific extension */ 133 struct proc_dir_entry *procent; /* device entry in /proc/bus/pci */ 134 135 unsigned int devfn; /* encoded device & function index */ 136 unsigned short vendor; 137 unsigned short device; 138 unsigned short subsystem_vendor; 139 unsigned short subsystem_device; 140 unsigned int class; /* 3 bytes: (base,sub,prog-if) */ 141 u8 hdr_type; /* PCI header type (`multi' flag masked out) */ 142 u8 rom_base_reg; /* which config register controls the ROM */ 143 u8 pin; /* which interrupt pin this device uses */ 144 145 struct pci_driver *driver; /* which driver has allocated this device */ 146 u64 dma_mask; /* Mask of the bits of bus address this 147 device implements. Normally this is 148 0xffffffff. You only need to change 149 this if your device has broken DMA 150 or supports 64-bit transfers. */ 151 152 pci_power_t current_state; /* Current operating state. In ACPI-speak, 153 this is D0-D3, D0 being fully functional, 154 and D3 being off. */ 155 156 pci_channel_state_t error_state; /* current connectivity state */ 157 struct device dev; /* Generic device interface */ 158 159 /* device is compatible with these IDs */ 160 unsigned short vendor_compatible[DEVICE_COUNT_COMPATIBLE]; 161 unsigned short device_compatible[DEVICE_COUNT_COMPATIBLE]; 162 163 int cfg_size; /* Size of configuration space */ 164 165 /* 166 * Instead of touching interrupt line and base address registers 167 * directly, use the values stored here. They might be different! 168 */ 169 unsigned int irq; 170 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */ 171 172 /* These fields are used by common fixups */ 173 unsigned int transparent:1; /* Transparent PCI bridge */ 174 unsigned int multifunction:1;/* Part of multi-function device */ 175 /* keep track of device state */ 176 unsigned int is_busmaster:1; /* device is busmaster */ 177 unsigned int no_msi:1; /* device may not use msi */ 178 unsigned int no_d1d2:1; /* only allow d0 or d3 */ 179 unsigned int block_ucfg_access:1; /* userspace config space access is blocked */ 180 unsigned int broken_parity_status:1; /* Device generates false positive parity */ 181 unsigned int msi_enabled:1; 182 unsigned int msix_enabled:1; 183 unsigned int is_managed:1; 184 atomic_t enable_cnt; /* pci_enable_device has been called */ 185 186 u32 saved_config_space[16]; /* config space saved at suspend time */ 187 struct hlist_head saved_cap_space; 188 struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */ 189 int rom_attr_enabled; /* has display of the rom attribute been enabled? */ 190 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */ 191 #ifdef CONFIG_PCI_MSI 192 struct list_head msi_list; 193 #endif 194 }; 195 196 extern struct pci_dev *alloc_pci_dev(void); 197 198 #define pci_dev_g(n) list_entry(n, struct pci_dev, global_list) 199 #define pci_dev_b(n) list_entry(n, struct pci_dev, bus_list) 200 #define to_pci_dev(n) container_of(n, struct pci_dev, dev) 201 #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL) 202 203 static inline int pci_channel_offline(struct pci_dev *pdev) 204 { 205 return (pdev->error_state != pci_channel_io_normal); 206 } 207 208 static inline struct pci_cap_saved_state *pci_find_saved_cap( 209 struct pci_dev *pci_dev,char cap) 210 { 211 struct pci_cap_saved_state *tmp; 212 struct hlist_node *pos; 213 214 hlist_for_each_entry(tmp, pos, &pci_dev->saved_cap_space, next) { 215 if (tmp->cap_nr == cap) 216 return tmp; 217 } 218 return NULL; 219 } 220 221 static inline void pci_add_saved_cap(struct pci_dev *pci_dev, 222 struct pci_cap_saved_state *new_cap) 223 { 224 hlist_add_head(&new_cap->next, &pci_dev->saved_cap_space); 225 } 226 227 /* 228 * For PCI devices, the region numbers are assigned this way: 229 * 230 * 0-5 standard PCI regions 231 * 6 expansion ROM 232 * 7-10 bridges: address space assigned to buses behind the bridge 233 */ 234 235 #define PCI_ROM_RESOURCE 6 236 #define PCI_BRIDGE_RESOURCES 7 237 #define PCI_NUM_RESOURCES 11 238 239 #ifndef PCI_BUS_NUM_RESOURCES 240 #define PCI_BUS_NUM_RESOURCES 8 241 #endif 242 243 #define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */ 244 245 struct pci_bus { 246 struct list_head node; /* node in list of buses */ 247 struct pci_bus *parent; /* parent bus this bridge is on */ 248 struct list_head children; /* list of child buses */ 249 struct list_head devices; /* list of devices on this bus */ 250 struct pci_dev *self; /* bridge device as seen by parent */ 251 struct resource *resource[PCI_BUS_NUM_RESOURCES]; 252 /* address space routed to this bus */ 253 254 struct pci_ops *ops; /* configuration access functions */ 255 void *sysdata; /* hook for sys-specific extension */ 256 struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */ 257 258 unsigned char number; /* bus number */ 259 unsigned char primary; /* number of primary bridge */ 260 unsigned char secondary; /* number of secondary bridge */ 261 unsigned char subordinate; /* max number of subordinate buses */ 262 263 char name[48]; 264 265 unsigned short bridge_ctl; /* manage NO_ISA/FBB/et al behaviors */ 266 pci_bus_flags_t bus_flags; /* Inherited by child busses */ 267 struct device *bridge; 268 struct class_device class_dev; 269 struct bin_attribute *legacy_io; /* legacy I/O for this bus */ 270 struct bin_attribute *legacy_mem; /* legacy mem */ 271 }; 272 273 #define pci_bus_b(n) list_entry(n, struct pci_bus, node) 274 #define to_pci_bus(n) container_of(n, struct pci_bus, class_dev) 275 276 /* 277 * Error values that may be returned by PCI functions. 278 */ 279 #define PCIBIOS_SUCCESSFUL 0x00 280 #define PCIBIOS_FUNC_NOT_SUPPORTED 0x81 281 #define PCIBIOS_BAD_VENDOR_ID 0x83 282 #define PCIBIOS_DEVICE_NOT_FOUND 0x86 283 #define PCIBIOS_BAD_REGISTER_NUMBER 0x87 284 #define PCIBIOS_SET_FAILED 0x88 285 #define PCIBIOS_BUFFER_TOO_SMALL 0x89 286 287 /* Low-level architecture-dependent routines */ 288 289 struct pci_ops { 290 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val); 291 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val); 292 }; 293 294 struct pci_raw_ops { 295 int (*read)(unsigned int domain, unsigned int bus, unsigned int devfn, 296 int reg, int len, u32 *val); 297 int (*write)(unsigned int domain, unsigned int bus, unsigned int devfn, 298 int reg, int len, u32 val); 299 }; 300 301 extern struct pci_raw_ops *raw_pci_ops; 302 303 struct pci_bus_region { 304 unsigned long start; 305 unsigned long end; 306 }; 307 308 struct pci_dynids { 309 spinlock_t lock; /* protects list, index */ 310 struct list_head list; /* for IDs added at runtime */ 311 unsigned int use_driver_data:1; /* pci_driver->driver_data is used */ 312 }; 313 314 /* ---------------------------------------------------------------- */ 315 /** PCI Error Recovery System (PCI-ERS). If a PCI device driver provides 316 * a set fof callbacks in struct pci_error_handlers, then that device driver 317 * will be notified of PCI bus errors, and will be driven to recovery 318 * when an error occurs. 319 */ 320 321 typedef unsigned int __bitwise pci_ers_result_t; 322 323 enum pci_ers_result { 324 /* no result/none/not supported in device driver */ 325 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1, 326 327 /* Device driver can recover without slot reset */ 328 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2, 329 330 /* Device driver wants slot to be reset. */ 331 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3, 332 333 /* Device has completely failed, is unrecoverable */ 334 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4, 335 336 /* Device driver is fully recovered and operational */ 337 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5, 338 }; 339 340 /* PCI bus error event callbacks */ 341 struct pci_error_handlers 342 { 343 /* PCI bus error detected on this device */ 344 pci_ers_result_t (*error_detected)(struct pci_dev *dev, 345 enum pci_channel_state error); 346 347 /* MMIO has been re-enabled, but not DMA */ 348 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev); 349 350 /* PCI Express link has been reset */ 351 pci_ers_result_t (*link_reset)(struct pci_dev *dev); 352 353 /* PCI slot has been reset */ 354 pci_ers_result_t (*slot_reset)(struct pci_dev *dev); 355 356 /* Device driver may resume normal operations */ 357 void (*resume)(struct pci_dev *dev); 358 }; 359 360 /* ---------------------------------------------------------------- */ 361 362 struct module; 363 struct pci_driver { 364 struct list_head node; 365 char *name; 366 const struct pci_device_id *id_table; /* must be non-NULL for probe to be called */ 367 int (*probe) (struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */ 368 void (*remove) (struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */ 369 int (*suspend) (struct pci_dev *dev, pm_message_t state); /* Device suspended */ 370 int (*suspend_late) (struct pci_dev *dev, pm_message_t state); 371 int (*resume_early) (struct pci_dev *dev); 372 int (*resume) (struct pci_dev *dev); /* Device woken up */ 373 int (*enable_wake) (struct pci_dev *dev, pci_power_t state, int enable); /* Enable wake event */ 374 void (*shutdown) (struct pci_dev *dev); 375 376 struct pci_error_handlers *err_handler; 377 struct device_driver driver; 378 struct pci_dynids dynids; 379 }; 380 381 #define to_pci_driver(drv) container_of(drv,struct pci_driver, driver) 382 383 /** 384 * PCI_DEVICE - macro used to describe a specific pci device 385 * @vend: the 16 bit PCI Vendor ID 386 * @dev: the 16 bit PCI Device ID 387 * 388 * This macro is used to create a struct pci_device_id that matches a 389 * specific device. The subvendor and subdevice fields will be set to 390 * PCI_ANY_ID. 391 */ 392 #define PCI_DEVICE(vend,dev) \ 393 .vendor = (vend), .device = (dev), \ 394 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID 395 396 /** 397 * PCI_DEVICE_CLASS - macro used to describe a specific pci device class 398 * @dev_class: the class, subclass, prog-if triple for this device 399 * @dev_class_mask: the class mask for this device 400 * 401 * This macro is used to create a struct pci_device_id that matches a 402 * specific PCI class. The vendor, device, subvendor, and subdevice 403 * fields will be set to PCI_ANY_ID. 404 */ 405 #define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \ 406 .class = (dev_class), .class_mask = (dev_class_mask), \ 407 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \ 408 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID 409 410 /** 411 * PCI_VDEVICE - macro used to describe a specific pci device in short form 412 * @vend: the vendor name 413 * @dev: the 16 bit PCI Device ID 414 * 415 * This macro is used to create a struct pci_device_id that matches a 416 * specific PCI device. The subvendor, and subdevice fields will be set 417 * to PCI_ANY_ID. The macro allows the next field to follow as the device 418 * private data. 419 */ 420 421 #define PCI_VDEVICE(vendor, device) \ 422 PCI_VENDOR_ID_##vendor, (device), \ 423 PCI_ANY_ID, PCI_ANY_ID, 0, 0 424 425 /* these external functions are only available when PCI support is enabled */ 426 #ifdef CONFIG_PCI 427 428 extern struct bus_type pci_bus_type; 429 430 /* Do NOT directly access these two variables, unless you are arch specific pci 431 * code, or pci core code. */ 432 extern struct list_head pci_root_buses; /* list of all known PCI buses */ 433 extern struct list_head pci_devices; /* list of all devices */ 434 435 void pcibios_fixup_bus(struct pci_bus *); 436 int __must_check pcibios_enable_device(struct pci_dev *, int mask); 437 char *pcibios_setup (char *str); 438 439 /* Used only when drivers/pci/setup.c is used */ 440 void pcibios_align_resource(void *, struct resource *, resource_size_t, 441 resource_size_t); 442 void pcibios_update_irq(struct pci_dev *, int irq); 443 444 /* Generic PCI functions used internally */ 445 446 extern struct pci_bus *pci_find_bus(int domain, int busnr); 447 void pci_bus_add_devices(struct pci_bus *bus); 448 struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus, struct pci_ops *ops, void *sysdata); 449 static inline struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata) 450 { 451 struct pci_bus *root_bus; 452 root_bus = pci_scan_bus_parented(NULL, bus, ops, sysdata); 453 if (root_bus) 454 pci_bus_add_devices(root_bus); 455 return root_bus; 456 } 457 struct pci_bus *pci_create_bus(struct device *parent, int bus, struct pci_ops *ops, void *sysdata); 458 struct pci_bus * pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev, int busnr); 459 int pci_scan_slot(struct pci_bus *bus, int devfn); 460 struct pci_dev * pci_scan_single_device(struct pci_bus *bus, int devfn); 461 void pci_device_add(struct pci_dev *dev, struct pci_bus *bus); 462 unsigned int pci_scan_child_bus(struct pci_bus *bus); 463 int __must_check pci_bus_add_device(struct pci_dev *dev); 464 void pci_read_bridge_bases(struct pci_bus *child); 465 struct resource *pci_find_parent_resource(const struct pci_dev *dev, struct resource *res); 466 int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge); 467 extern struct pci_dev *pci_dev_get(struct pci_dev *dev); 468 extern void pci_dev_put(struct pci_dev *dev); 469 extern void pci_remove_bus(struct pci_bus *b); 470 extern void pci_remove_bus_device(struct pci_dev *dev); 471 extern void pci_stop_bus_device(struct pci_dev *dev); 472 void pci_setup_cardbus(struct pci_bus *bus); 473 extern void pci_sort_breadthfirst(void); 474 475 /* Generic PCI functions exported to card drivers */ 476 477 struct pci_dev __deprecated *pci_find_device (unsigned int vendor, unsigned int device, const struct pci_dev *from); 478 struct pci_dev *pci_find_slot (unsigned int bus, unsigned int devfn); 479 int pci_find_capability (struct pci_dev *dev, int cap); 480 int pci_find_next_capability (struct pci_dev *dev, u8 pos, int cap); 481 int pci_find_ext_capability (struct pci_dev *dev, int cap); 482 int pci_find_ht_capability (struct pci_dev *dev, int ht_cap); 483 int pci_find_next_ht_capability (struct pci_dev *dev, int pos, int ht_cap); 484 struct pci_bus *pci_find_next_bus(const struct pci_bus *from); 485 486 struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device, 487 struct pci_dev *from); 488 struct pci_dev *pci_get_device_reverse(unsigned int vendor, unsigned int device, 489 struct pci_dev *from); 490 491 struct pci_dev *pci_get_subsys (unsigned int vendor, unsigned int device, 492 unsigned int ss_vendor, unsigned int ss_device, 493 struct pci_dev *from); 494 struct pci_dev *pci_get_slot (struct pci_bus *bus, unsigned int devfn); 495 struct pci_dev *pci_get_bus_and_slot (unsigned int bus, unsigned int devfn); 496 struct pci_dev *pci_get_class (unsigned int class, struct pci_dev *from); 497 int pci_dev_present(const struct pci_device_id *ids); 498 const struct pci_device_id *pci_find_present(const struct pci_device_id *ids); 499 500 int pci_bus_read_config_byte (struct pci_bus *bus, unsigned int devfn, int where, u8 *val); 501 int pci_bus_read_config_word (struct pci_bus *bus, unsigned int devfn, int where, u16 *val); 502 int pci_bus_read_config_dword (struct pci_bus *bus, unsigned int devfn, int where, u32 *val); 503 int pci_bus_write_config_byte (struct pci_bus *bus, unsigned int devfn, int where, u8 val); 504 int pci_bus_write_config_word (struct pci_bus *bus, unsigned int devfn, int where, u16 val); 505 int pci_bus_write_config_dword (struct pci_bus *bus, unsigned int devfn, int where, u32 val); 506 507 static inline int pci_read_config_byte(struct pci_dev *dev, int where, u8 *val) 508 { 509 return pci_bus_read_config_byte (dev->bus, dev->devfn, where, val); 510 } 511 static inline int pci_read_config_word(struct pci_dev *dev, int where, u16 *val) 512 { 513 return pci_bus_read_config_word (dev->bus, dev->devfn, where, val); 514 } 515 static inline int pci_read_config_dword(struct pci_dev *dev, int where, u32 *val) 516 { 517 return pci_bus_read_config_dword (dev->bus, dev->devfn, where, val); 518 } 519 static inline int pci_write_config_byte(struct pci_dev *dev, int where, u8 val) 520 { 521 return pci_bus_write_config_byte (dev->bus, dev->devfn, where, val); 522 } 523 static inline int pci_write_config_word(struct pci_dev *dev, int where, u16 val) 524 { 525 return pci_bus_write_config_word (dev->bus, dev->devfn, where, val); 526 } 527 static inline int pci_write_config_dword(struct pci_dev *dev, int where, u32 val) 528 { 529 return pci_bus_write_config_dword (dev->bus, dev->devfn, where, val); 530 } 531 532 int __must_check pci_enable_device(struct pci_dev *dev); 533 int __must_check pci_enable_device_bars(struct pci_dev *dev, int mask); 534 int __must_check pcim_enable_device(struct pci_dev *pdev); 535 void pcim_pin_device(struct pci_dev *pdev); 536 537 static inline int pci_is_managed(struct pci_dev *pdev) 538 { 539 return pdev->is_managed; 540 } 541 542 void pci_disable_device(struct pci_dev *dev); 543 void pci_set_master(struct pci_dev *dev); 544 int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state); 545 #define HAVE_PCI_SET_MWI 546 int __must_check pci_set_mwi(struct pci_dev *dev); 547 void pci_clear_mwi(struct pci_dev *dev); 548 void pci_intx(struct pci_dev *dev, int enable); 549 void pci_msi_off(struct pci_dev *dev); 550 int pci_set_dma_mask(struct pci_dev *dev, u64 mask); 551 int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask); 552 void pci_update_resource(struct pci_dev *dev, struct resource *res, int resno); 553 int __must_check pci_assign_resource(struct pci_dev *dev, int i); 554 int __must_check pci_assign_resource_fixed(struct pci_dev *dev, int i); 555 void pci_restore_bars(struct pci_dev *dev); 556 int pci_select_bars(struct pci_dev *dev, unsigned long flags); 557 558 /* ROM control related routines */ 559 void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size); 560 void __iomem __must_check *pci_map_rom_copy(struct pci_dev *pdev, size_t *size); 561 void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom); 562 void pci_remove_rom(struct pci_dev *pdev); 563 564 /* Power management related routines */ 565 int pci_save_state(struct pci_dev *dev); 566 int pci_restore_state(struct pci_dev *dev); 567 int pci_set_power_state(struct pci_dev *dev, pci_power_t state); 568 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state); 569 int pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable); 570 571 /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */ 572 void pci_bus_assign_resources(struct pci_bus *bus); 573 void pci_bus_size_bridges(struct pci_bus *bus); 574 int pci_claim_resource(struct pci_dev *, int); 575 void pci_assign_unassigned_resources(void); 576 void pdev_enable_device(struct pci_dev *); 577 void pdev_sort_resources(struct pci_dev *, struct resource_list *); 578 void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *), 579 int (*)(struct pci_dev *, u8, u8)); 580 #define HAVE_PCI_REQ_REGIONS 2 581 int __must_check pci_request_regions(struct pci_dev *, const char *); 582 void pci_release_regions(struct pci_dev *); 583 int __must_check pci_request_region(struct pci_dev *, int, const char *); 584 void pci_release_region(struct pci_dev *, int); 585 int pci_request_selected_regions(struct pci_dev *, int, const char *); 586 void pci_release_selected_regions(struct pci_dev *, int); 587 588 /* drivers/pci/bus.c */ 589 int __must_check pci_bus_alloc_resource(struct pci_bus *bus, 590 struct resource *res, resource_size_t size, 591 resource_size_t align, resource_size_t min, 592 unsigned int type_mask, 593 void (*alignf)(void *, struct resource *, 594 resource_size_t, resource_size_t), 595 void *alignf_data); 596 void pci_enable_bridges(struct pci_bus *bus); 597 598 /* Proper probing supporting hot-pluggable devices */ 599 int __must_check __pci_register_driver(struct pci_driver *, struct module *, 600 const char *mod_name); 601 static inline int __must_check pci_register_driver(struct pci_driver *driver) 602 { 603 return __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME); 604 } 605 606 void pci_unregister_driver(struct pci_driver *); 607 void pci_remove_behind_bridge(struct pci_dev *); 608 struct pci_driver *pci_dev_driver(const struct pci_dev *); 609 const struct pci_device_id *pci_match_device(struct pci_driver *drv, struct pci_dev *dev); 610 const struct pci_device_id *pci_match_id(const struct pci_device_id *ids, struct pci_dev *dev); 611 int pci_scan_bridge(struct pci_bus *bus, struct pci_dev * dev, int max, int pass); 612 613 void pci_walk_bus(struct pci_bus *top, void (*cb)(struct pci_dev *, void *), 614 void *userdata); 615 int pci_cfg_space_size(struct pci_dev *dev); 616 unsigned char pci_bus_max_busnr(struct pci_bus* bus); 617 618 /* kmem_cache style wrapper around pci_alloc_consistent() */ 619 620 #include <linux/dmapool.h> 621 622 #define pci_pool dma_pool 623 #define pci_pool_create(name, pdev, size, align, allocation) \ 624 dma_pool_create(name, &pdev->dev, size, align, allocation) 625 #define pci_pool_destroy(pool) dma_pool_destroy(pool) 626 #define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle) 627 #define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr) 628 629 enum pci_dma_burst_strategy { 630 PCI_DMA_BURST_INFINITY, /* make bursts as large as possible, 631 strategy_parameter is N/A */ 632 PCI_DMA_BURST_BOUNDARY, /* disconnect at every strategy_parameter 633 byte boundaries */ 634 PCI_DMA_BURST_MULTIPLE, /* disconnect at some multiple of 635 strategy_parameter byte boundaries */ 636 }; 637 638 struct msix_entry { 639 u16 vector; /* kernel uses to write allocated vector */ 640 u16 entry; /* driver uses to specify entry, OS writes */ 641 }; 642 643 644 #ifndef CONFIG_PCI_MSI 645 static inline int pci_enable_msi(struct pci_dev *dev) {return -1;} 646 static inline void pci_disable_msi(struct pci_dev *dev) {} 647 static inline int pci_enable_msix(struct pci_dev* dev, 648 struct msix_entry *entries, int nvec) {return -1;} 649 static inline void pci_disable_msix(struct pci_dev *dev) {} 650 static inline void msi_remove_pci_irq_vectors(struct pci_dev *dev) {} 651 #else 652 extern int pci_enable_msi(struct pci_dev *dev); 653 extern void pci_disable_msi(struct pci_dev *dev); 654 extern int pci_enable_msix(struct pci_dev* dev, 655 struct msix_entry *entries, int nvec); 656 extern void pci_disable_msix(struct pci_dev *dev); 657 extern void msi_remove_pci_irq_vectors(struct pci_dev *dev); 658 #endif 659 660 #ifdef CONFIG_HT_IRQ 661 /* The functions a driver should call */ 662 int ht_create_irq(struct pci_dev *dev, int idx); 663 void ht_destroy_irq(unsigned int irq); 664 #endif /* CONFIG_HT_IRQ */ 665 666 extern void pci_block_user_cfg_access(struct pci_dev *dev); 667 extern void pci_unblock_user_cfg_access(struct pci_dev *dev); 668 669 /* 670 * PCI domain support. Sometimes called PCI segment (eg by ACPI), 671 * a PCI domain is defined to be a set of PCI busses which share 672 * configuration space. 673 */ 674 #ifndef CONFIG_PCI_DOMAINS 675 static inline int pci_domain_nr(struct pci_bus *bus) { return 0; } 676 static inline int pci_proc_domain(struct pci_bus *bus) 677 { 678 return 0; 679 } 680 #endif 681 682 #else /* CONFIG_PCI is not enabled */ 683 684 /* 685 * If the system does not have PCI, clearly these return errors. Define 686 * these as simple inline functions to avoid hair in drivers. 687 */ 688 689 #define _PCI_NOP(o,s,t) \ 690 static inline int pci_##o##_config_##s (struct pci_dev *dev, int where, t val) \ 691 { return PCIBIOS_FUNC_NOT_SUPPORTED; } 692 #define _PCI_NOP_ALL(o,x) _PCI_NOP(o,byte,u8 x) \ 693 _PCI_NOP(o,word,u16 x) \ 694 _PCI_NOP(o,dword,u32 x) 695 _PCI_NOP_ALL(read, *) 696 _PCI_NOP_ALL(write,) 697 698 static inline struct pci_dev *pci_find_device(unsigned int vendor, unsigned int device, const struct pci_dev *from) 699 { return NULL; } 700 701 static inline struct pci_dev *pci_find_slot(unsigned int bus, unsigned int devfn) 702 { return NULL; } 703 704 static inline struct pci_dev *pci_get_device(unsigned int vendor, 705 unsigned int device, struct pci_dev *from) 706 { return NULL; } 707 708 static inline struct pci_dev *pci_get_device_reverse(unsigned int vendor, 709 unsigned int device, struct pci_dev *from) 710 { return NULL; } 711 712 static inline struct pci_dev *pci_get_subsys (unsigned int vendor, unsigned int device, 713 unsigned int ss_vendor, unsigned int ss_device, struct pci_dev *from) 714 { return NULL; } 715 716 static inline struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from) 717 { return NULL; } 718 719 #define pci_dev_present(ids) (0) 720 #define pci_find_present(ids) (NULL) 721 #define pci_dev_put(dev) do { } while (0) 722 723 static inline void pci_set_master(struct pci_dev *dev) { } 724 static inline int pci_enable_device(struct pci_dev *dev) { return -EIO; } 725 static inline void pci_disable_device(struct pci_dev *dev) { } 726 static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask) { return -EIO; } 727 static inline int pci_assign_resource(struct pci_dev *dev, int i) { return -EBUSY;} 728 static inline int __pci_register_driver(struct pci_driver *drv, struct module *owner) { return 0;} 729 static inline int pci_register_driver(struct pci_driver *drv) { return 0;} 730 static inline void pci_unregister_driver(struct pci_driver *drv) { } 731 static inline int pci_find_capability (struct pci_dev *dev, int cap) {return 0; } 732 static inline int pci_find_next_capability (struct pci_dev *dev, u8 post, int cap) { return 0; } 733 static inline int pci_find_ext_capability (struct pci_dev *dev, int cap) {return 0; } 734 static inline const struct pci_device_id *pci_match_device(const struct pci_device_id *ids, const struct pci_dev *dev) { return NULL; } 735 736 /* Power management related routines */ 737 static inline int pci_save_state(struct pci_dev *dev) { return 0; } 738 static inline int pci_restore_state(struct pci_dev *dev) { return 0; } 739 static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state) { return 0; } 740 static inline pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state) { return PCI_D0; } 741 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable) { return 0; } 742 743 static inline int pci_request_regions(struct pci_dev *dev, const char *res_name) { return -EIO; } 744 static inline void pci_release_regions(struct pci_dev *dev) { } 745 746 #define pci_dma_burst_advice(pdev, strat, strategy_parameter) do { } while (0) 747 748 static inline void pci_block_user_cfg_access(struct pci_dev *dev) { } 749 static inline void pci_unblock_user_cfg_access(struct pci_dev *dev) { } 750 751 #endif /* CONFIG_PCI */ 752 753 /* Include architecture-dependent settings and functions */ 754 755 #include <asm/pci.h> 756 757 /* these helpers provide future and backwards compatibility 758 * for accessing popular PCI BAR info */ 759 #define pci_resource_start(dev,bar) ((dev)->resource[(bar)].start) 760 #define pci_resource_end(dev,bar) ((dev)->resource[(bar)].end) 761 #define pci_resource_flags(dev,bar) ((dev)->resource[(bar)].flags) 762 #define pci_resource_len(dev,bar) \ 763 ((pci_resource_start((dev),(bar)) == 0 && \ 764 pci_resource_end((dev),(bar)) == \ 765 pci_resource_start((dev),(bar))) ? 0 : \ 766 \ 767 (pci_resource_end((dev),(bar)) - \ 768 pci_resource_start((dev),(bar)) + 1)) 769 770 /* Similar to the helpers above, these manipulate per-pci_dev 771 * driver-specific data. They are really just a wrapper around 772 * the generic device structure functions of these calls. 773 */ 774 static inline void *pci_get_drvdata (struct pci_dev *pdev) 775 { 776 return dev_get_drvdata(&pdev->dev); 777 } 778 779 static inline void pci_set_drvdata (struct pci_dev *pdev, void *data) 780 { 781 dev_set_drvdata(&pdev->dev, data); 782 } 783 784 /* If you want to know what to call your pci_dev, ask this function. 785 * Again, it's a wrapper around the generic device. 786 */ 787 static inline char *pci_name(struct pci_dev *pdev) 788 { 789 return pdev->dev.bus_id; 790 } 791 792 793 /* Some archs don't want to expose struct resource to userland as-is 794 * in sysfs and /proc 795 */ 796 #ifndef HAVE_ARCH_PCI_RESOURCE_TO_USER 797 static inline void pci_resource_to_user(const struct pci_dev *dev, int bar, 798 const struct resource *rsrc, resource_size_t *start, 799 resource_size_t *end) 800 { 801 *start = rsrc->start; 802 *end = rsrc->end; 803 } 804 #endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */ 805 806 807 /* 808 * The world is not perfect and supplies us with broken PCI devices. 809 * For at least a part of these bugs we need a work-around, so both 810 * generic (drivers/pci/quirks.c) and per-architecture code can define 811 * fixup hooks to be called for particular buggy devices. 812 */ 813 814 struct pci_fixup { 815 u16 vendor, device; /* You can use PCI_ANY_ID here of course */ 816 void (*hook)(struct pci_dev *dev); 817 }; 818 819 enum pci_fixup_pass { 820 pci_fixup_early, /* Before probing BARs */ 821 pci_fixup_header, /* After reading configuration header */ 822 pci_fixup_final, /* Final phase of device fixups */ 823 pci_fixup_enable, /* pci_enable_device() time */ 824 pci_fixup_resume, /* pci_enable_device() time */ 825 }; 826 827 /* Anonymous variables would be nice... */ 828 #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, hook) \ 829 static const struct pci_fixup __pci_fixup_##name __attribute_used__ \ 830 __attribute__((__section__(#section))) = { vendor, device, hook }; 831 #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \ 832 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \ 833 vendor##device##hook, vendor, device, hook) 834 #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \ 835 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \ 836 vendor##device##hook, vendor, device, hook) 837 #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \ 838 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \ 839 vendor##device##hook, vendor, device, hook) 840 #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \ 841 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \ 842 vendor##device##hook, vendor, device, hook) 843 #define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \ 844 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \ 845 resume##vendor##device##hook, vendor, device, hook) 846 847 848 void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev); 849 850 void __iomem * pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen); 851 void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr); 852 void __iomem * const * pcim_iomap_table(struct pci_dev *pdev); 853 int pcim_iomap_regions(struct pci_dev *pdev, u16 mask, const char *name); 854 void pcim_iounmap_regions(struct pci_dev *pdev, u16 mask); 855 856 extern int pci_pci_problems; 857 #define PCIPCI_FAIL 1 /* No PCI PCI DMA */ 858 #define PCIPCI_TRITON 2 859 #define PCIPCI_NATOMA 4 860 #define PCIPCI_VIAETBF 8 861 #define PCIPCI_VSFX 16 862 #define PCIPCI_ALIMAGIK 32 /* Need low latency setting */ 863 #define PCIAGP_FAIL 64 /* No PCI to AGP DMA */ 864 865 extern unsigned long pci_cardbus_io_size; 866 extern unsigned long pci_cardbus_mem_size; 867 868 #endif /* __KERNEL__ */ 869 #endif /* LINUX_PCI_H */ 870